There's a new writing team behind this second sequel to the 2009 one-crazy-night comedy.

They have abandoned the signature flashback structure, and the appalling sexism that tainted the first sequel in particular. What's left is Bradley Cooper and Ed Helms playing straight-men to Zach Galifianakis's by now familiar man-child routine, and an undemanding kidnap caper which takes the gang to Tijuana and Las Vegas.